there is no indication either way that they practiced any religeon, but just in case, and to leave no stone unturned, go here
http://www.jewishgen.org/JGS-sanantonio/
The Jewish Genealogical Society of San Antonio is sponsored by the Barshop Jewish Community Center (J.C.C.). We meet on the 3rd Sunday of every month, in the Beldon Library unless otherwise announced. We often have a distinguished guest who speaks on a pertinent topic relevant to finding one's Jewish roots.

We offer workshops to help our members research their family history.